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EP0918184B1 - Connection member for pipes - Google Patents

Connection member for pipes Download PDF

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Publication number
EP0918184B1
EP0918184B1 EP98121247A EP98121247A EP0918184B1 EP 0918184 B1 EP0918184 B1 EP 0918184B1 EP 98121247 A EP98121247 A EP 98121247A EP 98121247 A EP98121247 A EP 98121247A EP 0918184 B1 EP0918184 B1 EP 0918184B1
Authority
EP
European Patent Office
Prior art keywords
diameter
connector element
seal
element according
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98121247A
Other languages
German (de)
French (fr)
Other versions
EP0918184A3 (en
EP0918184A2 (en
Inventor
Hermann Becker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ITT Manufacturing Enterprises LLC
Original Assignee
ITT Manufacturing Enterprises LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ITT Manufacturing Enterprises LLC filed Critical ITT Manufacturing Enterprises LLC
Publication of EP0918184A2 publication Critical patent/EP0918184A2/en
Publication of EP0918184A3 publication Critical patent/EP0918184A3/en
Application granted granted Critical
Publication of EP0918184B1 publication Critical patent/EP0918184B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/16—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses with sealing or securing means using fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/30—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses comprising parts inside the hoses only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S285/00—Pipe joints or couplings
    • Y10S285/91—Gaskets

Definitions

  • the invention relates to a connecting element for pipes or Hoses made of elastically expandable material with one Pipe part made of inelastic material that seals in one Pipe or hose end is insertable and a so-called Pine cone or mandrel profile (see, for example, WO-A-95/33157).
  • connection or coupling elements with such Plug-in ends are already known in various forms. she are used for pipes and hoses that are used for Water or other liquids with a few bar at most Overpressure compared to the ambient pressure are designed. there the pine cones formed on the pipe part or Mandrel profiles ensure that the pipe or hose end without additional fastening parts with the connecting element can be sealingly connected, as a rule a combined powerful and fluid connection comes at which the pipe or hose end slightly is expanded and acting radially inwards Restoring forces while the sharp edges of the Pine cone or mandrel profile made of inelastic material like barbs in the inner wall of the pipe or Claw the end of the hose.
  • the invention has for its object the aforementioned Disadvantages with a connecting element of the aforementioned Kind to avoid and the insertable pipe part like this train that a reliable seal of the Push-in connection reached and a move or Damage to the sealing element can be avoided.
  • Fig. 1 is the insertion end of a connection element for Tubes or hoses made of elastically expandable material shown, which consists essentially of a tubular part 1 there is inelastic material.
  • this pipe part 1 are in a manner known per se, pine cone or mandrel rings 6, 7 trained, each one from front to back conical enlarging diameter and one at the rear end have annular boundary surface which is perpendicular to The main axis of the tubular part 1 runs.
  • front end 2 of the pipe part 1 instead of a pine cone or Dornrings an axially extending circular cylindrical area 3 provided Outside diameter on the inside diameter of the pipe or Hose end is matched for the connecting element is provided.
  • this cylindrical area 3 is one circumferential, cross-sectionally rectangular groove 4 formed in an annular seal 5 with a non-circular Cross section is arranged.
  • Erfindungsgemä ⁇ is the cross section of the seal 5 trained that he inside on the rectangular Cross section of the groove 4 is adjusted and this completely fills.
  • the seal has one on the outside Curve shape, the radius of which is from front to back steadily enlarged.
  • On the front boundary wall of the groove the outer diameter of the seal 5 is slightly smaller than the diameter of the boundary wall of the groove 4, while on rear end of the seal 5 whose diameter is larger as the boundary wall of the groove 4 or as the cylindrical Area 3.
  • Diameter can also be slightly larger than the diameter of the previous pine cone or Dorn ring.
  • connection element created a reliable with easy handling Sealing of the plug-in connection is guaranteed and that too usable for only little elastic pipe or hose ends is.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Joints That Cut Off Fluids, And Hose Joints (AREA)

Description

Die Erfindung betrifft ein Anschlußelement für Rohre oder Schläuche aus elastisch aufweitbarem Material mit einem Rohrteil aus unelastischem Material, das abdichtend in ein Rohr- oder Schlauchende einsteckbar ist und ein sogenanntes Tannenzapfen- oder Dornprofil aufweist (siehe, zum Beispiel, WO-A-95/33157).The invention relates to a connecting element for pipes or Hoses made of elastically expandable material with one Pipe part made of inelastic material that seals in one Pipe or hose end is insertable and a so-called Pine cone or mandrel profile (see, for example, WO-A-95/33157).

Anschluß- oder Kupplungselemente mit derartigen Einsteckenden sind bereits in vielfältiger Form bekannt. Sie werden bei Rohr- und Schlauchleitungen verwendet, die für Wasser oder andere Flüssigkeiten mit allenfalls einigen bar Überdruck gegenüber dem Umgebungsdruck ausgelegt sind. Dabei sollen die am Rohrteil ausgebildeten Tannenzapfen- oder Dornprofile gewährleisten, daß Rohr- oder Schlauchende ohne zusätzliche Befestigungsteile mit dem Anschlußelement abdichtend verbunden werden können, wobei in aller Regel eine kombinierte kraft- und formflüssige Verbindung zustande kommt, bei der das Rohr- oder Schlauchende geringfügig aufgeweitet wird und radial nach innen wirkende Rückstellkräfte ausübt, während die scharfen Kanten des Tannenzapfen- oder Dornprofils aus unelastischem Material sich wie Widerhaken in die Innenwand des Rohr- oder Schlauchendes einkrallen.Connection or coupling elements with such Plug-in ends are already known in various forms. she are used for pipes and hoses that are used for Water or other liquids with a few bar at most Overpressure compared to the ambient pressure are designed. there the pine cones formed on the pipe part or Mandrel profiles ensure that the pipe or hose end without additional fastening parts with the connecting element can be sealingly connected, as a rule a combined powerful and fluid connection comes at which the pipe or hose end slightly is expanded and acting radially inwards Restoring forces while the sharp edges of the Pine cone or mandrel profile made of inelastic material like barbs in the inner wall of the pipe or Claw the end of the hose.

Es dürfte ohne weiteres einleuchten, daß der Erfolg einer derartigen kombinierten Einsteckverbindung in ganz erheblichem Maße von den Fertigungstoleranzen der beteiligten Bauteile und von ihren Materialeigenschaften abhängig ist. Zur Verbesserung der Abdichtung derartiger Einsteckverbindungen ist bereits vorgeschlagen worden, am vorderen Ende des Rohrteils einen kreiszylindrischen Abschnitt vorzusehen, und in diesem eine umlaufende Nut für einen O-Ring auszubilden. Auf diese Weise konnte die Dichtwirkung verbessert werden. Es hat sich jedoch herausgestellt, daß eine verbesserte Dichtwirkung nur erreicht werden kann, wenn das Einstecken des Rohrteils in das Rohr- oder Schlauchende mit großer Sorgfalt durchgeführt wird, weil anderenfalls der O-Ring aus der Nut herausgedrückt oder aber über den Umfang verteilt in sich unterschiedlich verdrillt wird, wodurch seine Dichtwirkung ganz oder teilweise verloren geht. Wegen der engen Abstimmung des zylindrischen Bereichs auf den Innendurchmesser des Rohr- oder Schlauchendes werden beim Einstecken am O-Ring erhebliche Scherkräfte wirksam, die zudem von der Oberflächenrauhigkeit der Innenwand des Rohroder Schlauchendes abhängig sind, so daß ein Verschieben oder Beschädigen des O-Rings auch bei sorgfältiger Handhabung nicht zuverlässig vermieden werden kann.It is obvious that the success of a such combined plug-in connection throughout considerable of the manufacturing tolerances of the involved components and their material properties is dependent. To improve the sealing of such Plug-in connections have already been proposed on front end of the tubular part a circular cylindrical Provide section, and in this a circumferential groove for to form an O-ring. That way the Sealing effect can be improved. However, it has pointed out that an improved sealing effect only can be achieved when inserting the pipe part in the pipe or hose end carried out with great care otherwise the O-ring will come out of the groove pushed out or distributed over the circumference in itself is twisted differently, reducing its sealing effect is lost in whole or in part. Because of the tight Matching the cylindrical area to the Inner diameter of the pipe or hose end are at Inserting significant shear forces on the O-ring effectively also from the surface roughness of the inner wall of the pipe or Hose ends are dependent, so that moving or damage the O-ring even if it is carefully Handling cannot be reliably avoided.

Der Erfindung liegt die Aufgabe zugrunde, die vorgenannten Nachteile bei einem Anschlußelement der eingangs genannten Art zu vermeiden und das einsteckbare Rohrteil derartig auszubilden, daß eine zuverlässige Abdichtung der Einsteckverbindung erreicht und ein Verschieben oder Beschädigen des Dichtelements vermieden werden kann.The invention has for its object the aforementioned Disadvantages with a connecting element of the aforementioned Kind to avoid and the insertable pipe part like this train that a reliable seal of the Push-in connection reached and a move or Damage to the sealing element can be avoided.

Diese Aufgabe wird erfindungsgemäß durch die im Anspruch 1 definiezten Merkmale gelöst. This object is achieved by the features defined in claim 1.

Mit derartigen Querschnittsformen für die Nut und die Dichtung wird erreicht, daß die beim Einstecken auftretenden Scherkräfte an der Dichtung sicher aufgenommen werden können, ohne daß die Dichtung aus der Nut herausgetrieben oder aber in sich derart verformt wird, daß ihre Dichtwirkung verloren geht. Der rechteckige Nutgrund und der darauf abgestimmte Querschnitt der ringförmigen Dichtung gewährleisten eine sichere formschlüssige Verbindung zwischen Rohrteil und Dichtung, die auch bei einem Einstecken in ein Rohr- oder Schlauchende zuverlässig hält, ohne daß insoweit eine überdurchschnittlich sorgfältige Handhabung erforderlich wäre.With such cross-sectional shapes for the groove and the Seal is achieved that the occurring when inserting Shear forces on the seal are safely absorbed can without driving the seal out of the groove or is deformed in such a way that their Sealing effect is lost. The rectangular groove base and the matching cross-section of the annular seal ensure a secure positive connection between the pipe part and the seal, which is also Reliably inserted into a pipe or hose end, without an above-average careful Handling would be required.

Vorteilhafte Weiterbildungen des Erfindungsgedankens sind in den Unteransprüchen 2 bis 7 beschrieben. Weitere Einzelheiten werden anhand des in Fig. 1 dargestellten Ausführungsbeispiels näher erläutert.Advantageous developments of the inventive concept are in the subclaims 2 to 7 described. Further Details are shown with reference to that in FIG. 1 Embodiment explained in more detail.

In Fig. 1 ist das Einsteckende eines Anschlußelements für Rohre oder Schläuche aus elastisch aufweitbarem Material dargestellt, das im wesentlichen aus einem Rohrteil 1 aus unelastischem Material besteht. Bei diesem Rohrteil 1 sind in an sich bekannter Weise Tannenzapfen- oder Dornringe 6, 7 ausgebildet, die jeweils einen sich von vorne nach hinten konisch vergrößernden Durchmesser und am hinteren Ende eine ringförmige Begrenzungsfläche aufweisen, die senkrecht zur Hauptachse des Rohrteils 1 verläuft. Erfindungsgemäß ist am vorderen Ende 2 des Rohrteils 1 statt eines Tannenzapfenoder Dornrings ein sich axial erstreckender kreiszylindrischer Bereich 3 vorgesehen, dessen Außendurchmesser auf den Innendurchmesser des Rohr- oder Schlauchendes abgestimmt ist, für den das Anschlußelement vorgesehen ist. In diesem zylindrischen Bereich 3 ist eine umlaufende, im Querschnitt rechteckige Nut 4 ausgebildet, in der eine ringförmige Dichtung 5 mit nicht kreisförmigem Querschnitt angeordnet ist. Erfindungsgemäβ ist der Querschnitt der Dichtung 5 so ausgebildet, daß er innenseitig an den rechteckigen Querschnitt der Nut 4 angepasst ist und diese vollständig ausfüllt. An der Außenseite weist die Dichtung eine Kurvenform auf, deren Radius sich von vorne nach hinten stetig vergrößert. An der vorderen Begrenzungswand der Nut ist der Außendurchmesser der Dichtung 5 etwas kleiner als der Durchmesser der Begrenzungswand der Nut 4, während am hinteren Ende der Dichtung 5 deren Durchmesser größer ist als die Begrenzungswand der Nut 4 bzw. als der zylindrische Bereich 3.In Fig. 1 is the insertion end of a connection element for Tubes or hoses made of elastically expandable material shown, which consists essentially of a tubular part 1 there is inelastic material. In this pipe part 1 are in a manner known per se, pine cone or mandrel rings 6, 7 trained, each one from front to back conical enlarging diameter and one at the rear end have annular boundary surface which is perpendicular to The main axis of the tubular part 1 runs. According to the invention front end 2 of the pipe part 1 instead of a pine cone or Dornrings an axially extending circular cylindrical area 3 provided Outside diameter on the inside diameter of the pipe or Hose end is matched for the connecting element is provided. In this cylindrical area 3 is one circumferential, cross-sectionally rectangular groove 4 formed in an annular seal 5 with a non-circular Cross section is arranged. Erfindungsgemäβ is the cross section of the seal 5 trained that he inside on the rectangular Cross section of the groove 4 is adjusted and this completely fills. The seal has one on the outside Curve shape, the radius of which is from front to back steadily enlarged. On the front boundary wall of the groove the outer diameter of the seal 5 is slightly smaller than the diameter of the boundary wall of the groove 4, while on rear end of the seal 5 whose diameter is larger as the boundary wall of the groove 4 or as the cylindrical Area 3.

Versuche haben gezeigt, daß sich mit diesen Querschnittsformen für Nut 4 und Dichtung 5 einerseits ein problemloses Einstecken des Rohrteils in einem Rohr- oder Schlauchende ermöglichen läßt, andererseits eine sich in axialer Richtung verhältnismäßig lang erstreckenden Dichtungsfläche erreichen läßt, die für alle einschlägigen Anwendungsfälle ausreichend ist und eine dauerhafte Abdichtung zwischen Rohrteil 1 und Einsteckende des Rohres oder Schlauches gewährleistet. Die Außenkontur der Dichtung 5 erleichtert das Einstecken und vermindert die Scherkräfte, die beim Einstecken auf die Dichtung 5 wirken. Experiments have shown that these Cross-sectional shapes for groove 4 and seal 5 on the one hand easy insertion of the pipe part in a pipe or Allow hose end, on the other hand one in Axial direction extending relatively long Sealing surface can be reached for all relevant Use cases is sufficient and permanent Sealing between pipe part 1 and insertion end of the pipe or hose guaranteed. The outer contour of the seal 5 facilitates insertion and reduces shear forces, which act on the seal 5 when inserted.

Gemäß einem weiteren Aspekt des Erfindungsgedankens weist der nach hinten auf den zylindrischen Bereich 3 folgende Tannenzapfen- oder Dornring 6 einen größeren Durchmesser auf als der zylindrische Bereich 3. Sind nach hinten zu weitere Tannenzapfen- oder Dornringe 7 vorgesehen, so sollen deren Durchmesser ebenfalls jeweils geringfügig größer sein als der Durchmesser des vorausgehenden Tannenzapfen- oder Dornrings. Auf diese Weise wird erreicht, daß das Rohr- oder Schlauchende beim Einstecken des Rohrteils 1 in Stufen stärker aufgeweitet wird, was insbesondere bei solchen Materialien vorteilhaft sein kann, die nur ein geringes elastisches Rückstellvermögen aufweisen. Dabei erfolgt jeder weitere Aufweitschritt praktisch unabhängig von dem voraufgehenden Schritt, so daß es zur Erzielung der erforderlichen Haltekräfte nicht erforderlich ist, daß sich die Aufweitungen der jeweils vorausgehenden Stufen vollständig zurückbilden können.According to a further aspect of the inventive concept the one that follows the cylindrical region 3 to the rear Fir cone or mandrel ring 6 on a larger diameter than the cylindrical area 3. Are to the rear to more Fir cone or mandrel rings 7 are provided, so should Diameter can also be slightly larger than the diameter of the previous pine cone or Dorn ring. In this way it is achieved that the pipe or Hose end when inserting the pipe part 1 in stages is expanded more, especially with such Materials that can be of little benefit have elastic resilience. Everyone does it further expansion step practically independent of that previous step so that it can achieve the required holding forces is not necessary that the widening of the previous stages can completely regress.

Mit den erfindungsgemäßen Merkmalen ist ein Anschlußelement geschaffen, das bei einfacher Handhabung eine zuverlässige Abdichtung der Einsteckverbindung gewährleistet und das auch für nur wenig elastische Rohr- oder Schlauchenden brauchbar ist.With the features of the invention is a connection element created a reliable with easy handling Sealing of the plug-in connection is guaranteed and that too usable for only little elastic pipe or hose ends is.

Claims (7)

  1. A connector element for tubing or hoses of elastically expandable material with a tubular part (1) of inelastic material that can be inserted tightly sealed into a tubing or hose end and that features a so called pine-cone or thorn profile, wherein an axially extending cylindrical area (3) with an outer diameter corresponding to the inner diameter of the tubing or hose end is provided at a front end (2) of the tubular part and wherein a circumferential groove (4), rectangular in cross section, into which an annular seal (5) of noncircular cross section is arranged, is formed in the cylindrical area (3), wherein the seal (5) having a rectangular cross section, wherein the cross-section is rectangular only on the inside and wherein it is convex over the entire longitudinal extent on the outside, characterized in that the cross section completly fills out the groove (4) and that the outside of the seal (5) has a curvature with a smaller radius in an area adjacent to the front end (2) of the tubular part (1) than in an opposite area.
  2. Connector element according to claim 1, characterized in that the curvature of the outside has a radius increasing steadily from the front to the back.
  3. Connector element according to one of the preceding claims, characterized in that the outer diameter of the seal (5) is smaller at the front end than the diameter of a limitation wall of the groove (4).
  4. Connector element according to one of the preceding claims, characterized in that a front limitation wall of the groove. (4) has a smaller diameter than the rear limitation wall respectively the cylindrical area (3).
  5. Connector element according to claim 4, characterized in that the cylindrical area (3) has a smaller diameter than the diameter of a next successive pine-cone or thorn ring to the rear.
  6. Connector element according to claim 5, characterized in that additional pine-cone or seal rings (7) are provided to the rear, each with a larger diameter.
  7. The connector element according to one of the preceding claims, characterized in that diameter increase per each additional step lies in the range of 5 to 12%.
EP98121247A 1997-11-20 1998-11-07 Connection member for pipes Expired - Lifetime EP0918184B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19751361 1997-11-20
DE19751361A DE19751361A1 (en) 1997-11-20 1997-11-20 Connection element for pipes or hoses

Publications (3)

Publication Number Publication Date
EP0918184A2 EP0918184A2 (en) 1999-05-26
EP0918184A3 EP0918184A3 (en) 2001-07-18
EP0918184B1 true EP0918184B1 (en) 2004-02-25

Family

ID=7849256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121247A Expired - Lifetime EP0918184B1 (en) 1997-11-20 1998-11-07 Connection member for pipes

Country Status (4)

Country Link
US (1) US6199915B1 (en)
EP (1) EP0918184B1 (en)
DE (2) DE19751361A1 (en)
ES (1) ES2212202T3 (en)

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IT234330Y1 (en) * 1994-05-27 2000-03-09 Manuli Auto Italia Spa FITTING FOR FLEXIBLE HOSES WITH AT LEAST ONE RESILIENT RING
DE19543782A1 (en) * 1995-11-24 1997-05-28 Bayerische Motoren Werke Ag Device for connecting two components, especially on motor vehicle fuel pump

Also Published As

Publication number Publication date
ES2212202T3 (en) 2004-07-16
US6199915B1 (en) 2001-03-13
EP0918184A3 (en) 2001-07-18
DE59810837D1 (en) 2004-04-01
EP0918184A2 (en) 1999-05-26
DE19751361A1 (en) 1999-05-27

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